Research Article

Fully Automated Lumen Segmentation Method for Intracoronary Optical Coherence Tomography

Table 3

Statistical comparison of parameters between our methodology and commercially available system 1.

Our method (first measure) mean (CI)System 1 (second measure) mean (CI)Our method (first measure) median (IQR)System 1 (second measure) median (IQR)DifferenceRelative differenceICC (95% CI)ICC value

Lumen area5.99 (5.83–6.14)6.04 (5.90–6.19)6.45 (4.72–7.67)6.50 (5.01–7.56)−0.06 (−0.08–−0.03)1.67% (1.25%–2.10%)0.99 (0.98–0.99)<0.0001
Mean lumen diameter2.72 (2.68–2.76)2.72 (2.68–2.76)2.88 (2.41–3.13)2.87 (2.52–3.10)−0.00 (−0.01–0.00)0.34% (0.06%–0.63%)0.98 (0.97–0.98)<0.0001
Minimal lumen diameter2.52 (2.48–2.56)2.52 (2.48–2.56)2.64 (2.18–2.96)2.52 (2.48–2.56)0.00 (−0.01–0.01)0.16% (−0.16%–0.49%)0.98 (0.97–0.98)<0.0001
Maximal lumen diameter2.91 (2.87–2.96)2.93 (2.89–2.97)3.07 (2.54–3.30)3.08 (2.66–3.28)−0.02 (−0.03–−0.00)0.82% (0.43%–1.21%)0.94 (0.93–0.95)<0.0001